최종 변경 : 2024.01.23

8강 까지 구현한 CustomOAuth2UserService

@Service
public class CustomOAuth2UserService extends DefaultOAuth2UserService {
    //DefaultOAuth2UserService OAuth2UserService의 구현체

    @Override
    public OAuth2User loadUser(OAuth2UserRequest userRequest) throws OAuth2AuthenticationException {

        OAuth2User oAuth2User = super.loadUser(userRequest);
        System.out.println(oAuth2User.getAttributes());

        String registrationId = userRequest.getClientRegistration().getRegistrationId();
        OAuth2Response oAuth2Response = null;
        if (registrationId.equals("naver")) {

            oAuth2Response = new NaverResponse(oAuth2User.getAttributes());
        }
        else if (registrationId.equals("google")) {

            oAuth2Response = new GoogleReponse(oAuth2User.getAttributes());
        }
        else {

            return null;
        }

				//추후 작성
    }
}

나머지 CustomOAuth2UserService

@Service
public class CustomOAuth2UserService extends DefaultOAuth2UserService {
    //DefaultOAuth2UserService OAuth2UserService의 구현체

    @Override
    public OAuth2User loadUser(OAuth2UserRequest userRequest) throws OAuth2AuthenticationException {

        OAuth2User oAuth2User = super.loadUser(userRequest);
        System.out.println(oAuth2User.getAttributes());

        String registrationId = userRequest.getClientRegistration().getRegistrationId();
        OAuth2Response oAuth2Response = null;
        if (registrationId.equals("naver")) {

            oAuth2Response = new NaverResponse(oAuth2User.getAttributes());
        }
        else if (registrationId.equals("google")) {

            oAuth2Response = new GoogleReponse(oAuth2User.getAttributes());
        }
        else {

            return null;
        }

        String role = "ROLE_USER";

        return new CustomOAuth2User(oAuth2Response, role);
    }
}

CustomOAuth2User 생성

package com.example.testvideo.dto;

import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.oauth2.core.user.OAuth2User;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Map;

public class CustomOAuth2User implements OAuth2User {

    private final OAuth2Response oAuth2Response;
    private final String role;

    public CustomOAuth2User(OAuth2Response oAuth2Response, String role) {

        this.oAuth2Response = oAuth2Response;
        this.role = role;
    }

    @Override
    public Map<String, Object> getAttributes() {

        return null;
    }

    @Override
    public Collection<? extends GrantedAuthority> getAuthorities() {

        Collection<GrantedAuthority> collection = new ArrayList<>();

        collection.add(new GrantedAuthority() {

            @Override
            public String getAuthority() {

                return role;
            }
        });

        return collection;
    }

    @Override
    public String getName() {

        return oAuth2Response.getName();
    }

    public String getUsername() {

        return oAuth2Response.getProvider()+" "+oAuth2Response.getProviderId();
    }
}